docs: def cli(env, volume_id, schedule_type):
      """Disables snapshots on the specified schedule for a given volume"""
  
      if (schedule_type not in ['INTERVAL', 'HOURLY', 'DAILY', 'WEEKLY']):
          raise exceptions.CLIAbort(
              '--schedule-type must be INTERVAL, HOURLY, DAILY, or WEEKLY')
  
      block_manager = SoftLayer.BlockStorageManager(env.client)
      disabled = block_manager.disable_snapshots(volume_id, schedule_type)
  
      if disabled:
          click.echo('%s snapshots have been disabled for volume %s'
                     % (schedule_type, volume_id))